Substation-protector.



. No. 897,590. I PATENTBD SEPT. 1, 1908;

F; 1;. 000K. SUBSTATION PROTECTOR.

APPLICATION FILED NOV. 8, 1907.

. prises asuitable insulating base 1;, preferabl by excessive current.Each spring member FRANK B. COOK, OF onloaco; iL INoIs.

SUBBTATION-PBOIECTOR.

Specification of Letters Patent. I

Patented Sept. 1,' 1908.

Application filed November 8, 1907. Serial No. 401,348.

To all whom it may concern:

Be it known that I, FRANK B. 0001:, a. citizen of the United States ofAmerica, residing at Chicago, in the county of= Cook and Stateoflllinois, have invented a new and useful Substation-Protector,- ofwhich theifollowing is a specification, reference being had to theaccompanying drawings, illustrating same.

My invention relates to electrical protective apparatus, and moreparticularly to protector units adapted for protecting individual linesof an electrical system, such as atelephone system.

T e principal objects of my invention are to rovide a compact andsimplified form of in lvidual protector unit of the character specified;to provide an improved arrange- .ment and mounting of. the lightningarlilghtning arresters retrieved; Ff 2 is a side e evation 'ofjtheprotectdr unit shown-in Fig. 1, with portions shown in cross-sectiontaken on line z a: of 1 and Fig. 3 is a longitudinal cross-sectionalview of one of the light:

ning arresters of the protector unit, taken on line y y of Fig. 1, 'w1ththe s'ring. members shown in elevation, showing t e mounting ofthelightning arrester in detail. Like characters refer to like parts inthe several figures. I

The protector unit of the invention co'mmade of porcelain, alongthesidesof whic are-mounted @pair of inclosed fuses 2 2 by suitablesprin'gmembers 3 3 and 4 4: The inclosed fuses 2 2 are of an ap rovedtype which do not blow up or emit a ame when blown 3 is preferablymounted in a rec'ess fi' on the base 1 by a b nding screw 6, soas'tekeep it from turning upon the base 1, and each I the protectorunitof this invention; withthe' cover for the,

b hig spring'member 4 is referably mounted on t e base 1 by a bin mgscrew 7, preferably as shown. Between the fuses 2 2 and near one endthereof is provided a cylindricallyshaped recess 8 in the base 1 withinwhich recess 8 the lightning arresters 9 9 are mounted perpendicular tothe base'l each lightning arrester 9 preferably comprising the usualpair of carbon blocks with an interposed dielectric. The groundconnection for the lightning arresters 99 is preferably in the form ofa' sprin member 12 mounted upon the base 1 by a inding screw 10 andwithin the recess 8 by screw 11. The end of the spring member 12 whichis in the recess 8, is provided with a. pair of prongs 13 13 whichdouble back upon themselves as shown in Fig. 3 to provide spring contactmembers for the lightning arresters 9 9; Each springinernber' 4 isrovided with an arm 14 extending into t e-re'c'ess 8. and formed at itsfree end as shown in Fig.3, so as to provide a line-spring contactmember for each of the lightning arresters 9 9. Portions 1.2 14 14 passthrough the circular wall 15 of the recess 8 through slots formed in thewall 15.

The wall 15 extends above the top of the base' 1' so as to provideadeeper recess 8 for the lightning arr-esters 9 9 without increasing thethickness of the base 1.

Part-way down the side of the. recess 8 is provided an annular offset 16against which the bottom end of a sheet-metal cap 17 rests when the cap17 is laced within the recess 8 so as to cover the ightning arresters 99 as shown in Fig. 2. The sides of the cap'1- 7 are preferably split soas to enable the latter tospring outward and thereby ti htl fit theupper. ortion of the recess 8 to lOl the cap 17 m p ace. 1 This 0211 117,- the wall 15 and the recess 8 inclose the-lightning arresters 9 9'an'd'a protectionto external portions against any injurious electricaleffects which might potentia and thereby provide a simple andsubstamroduced u on the passage of abnormally I electrlcity through thearr rosters 9 9. The inclosure-in' which .the'

lightning arresters 9 9 arelocated is vented by' the slots in the wall15 through which spring members 12 14 14 pass. 7 This ventin 0 against t1% cap 17 blowing off under abnormal 'electrical conditions. Other meansof venting the lightning arrester inclosure the lightning arresterinclosure guar,

may also be provided if desired. 'lhebase 1 is provided with holes 18 1818 for mounting the rotector unit to a suitable sup ort.

It wilFbe seen that the construction a ove described provides a verysimple and substantial protector unit and one which is absolutely safeto use within a building, the lightning arresters being entirelyinclosed and the fuses being of the, inclosed type which do not blow upor emit a flame upon an excessive current. It will also be seen thatwhen one of the fuses 2 is removed from the base 1 the circuit isopenbetween spring members 3 and 4 for the entire length of the fuse, therebeing no metal portions on the base 1 to reduce the length of the ga Jmade by remox ing the fuse. It will also be seen that the number ofspring parts on this protector unit is reduced to a minimum, by theirpeculiar formations.

Binding posts "6 6 are for the line conductors, binding posts 7 7 arefor the instrument or switchboard conductors, de endingn on where theprotector unit is use and bin ing"- post 10 is for the ground conductorfor the ightning arresters.

' the circuits through the apparatus W1 be readily understood- I do notwish to limit this invention to all of the articular details ofconstruction as herein s own, as many modifications may be made thereinwithout departing from the fuses mounted alon see e of the appendedclaims. aving thus described my invention what I claim is:

-1. A protector unit of the character described c'omprisin asubstantially fiat base made of noncon ucting material, tubular thesides of the base substantially paralle therewith, acylindrically-shaped recess in the said base between the said fuses andnear one end thereof, an

annular wall projecting from the said 'base around the-saidrecess toin'crease the depth of the latter without necessitating the thick eningof the body of the base, a pair of light ning arresters'located withinthe said recess.

substantiallyperpendicular to the said base,

a pair of s. ring members mounted on top of the said' ase, formed toterminals for thelrespective uses and extend ing into the said recessthrough slots in the walLof the latter, and having t eir inner endsformed to respective htm' arresters, a ground ter- 'minal forthelightning arresters, mounted on From this descri )tion rovide suitable.

rovide suitable terminals for the top of the said base, extending intothe said recess to the bottom thereof through a slot in the wall ofthe-recess and having its-inner end bifurcated and formed tofprovidesuitable ground terminals for the res ective lightning arresters, a boltextending t rough the bottom of the base .into the said recess forholding the ground-terminal member in place, a ledge around the innerside of the wall of the said recess, a formed sheet-metal cap fittingthe interiorof the wall of the said I recess and resting against thesaid. -ledge which limits the insertion of the cap into the recess, thesaid cap forming a covering for the lightning arresters, the slots inthe wall of the said recess through which the lightning-arresterterminals pass forming vents for the hghtnmg-an'ester lnelosure, andsuitable binding posts for connecting circuit conductors to the fusesand lightningflarresters. 2. A protector unit of the character describedcomprising a substantially flat base,

a pair of fuses mounted along the sides of the use, a recess in the basebetween the'fuses andiiearone end thereof, a wall around the recess proecting. from the base to mcrease the depth of the recess withoutnecessitating the thickening of the body of the base, a pair oflightning arresters located within the recess, a air of'sprin membersmounted on top of the ase, forme' to provide suitable terminals for therespective fuses and extendin into the said recess through slots in thewa l of the latter, and having their inner ends formed to rovidesuitable terminals for therespective terminal for the recess throughaslot in the wall thereof and having its inner end bifurcated and formedto providesuitable ground terminals for the respective lightningarresters, a cap fitting the wall of the said recess and forming' acovering for the lightning arresters, and suitable binding posts forconnecting circuit 'bnductors to the fuses and lightning arresters.

As inventor of the foregoing I hereunto subscribe my name in thepresence of two.

subscribing witnesses, this 6th day of November, 1907.

FRANK B. COOK. Witnesses: I '7 Fnnnsmcn R. PARKER, H. ROY COOK.

lgjitning arresters, a ground 'ghtning arresters mounted on top of thebase, extending into the said-

